This is a 2013 GMC Yukon XL complete roof rack crossbars system, comprised of the Yakima Railgrab towers and 58 inch roof rack cross-bars. Yakima SKS lock cores sold separately. The recommended Fairing by Yakima for this roof rack on your 2013 Yukon XL is the 44 inch Fairing, NOT included.
The on-vehicle rack specifications for the 2013 GMC Yukon XL:
Load Capacity of 165 pounds.
Maximum Bar spread is 71 inches.
Manufacturer's part number: 8000140
CargoGear Reviews - Yakima Railgrab Rack System for Cars with Roof Rails
4 stars - Worked as advertised
Written by RC, on 8/4/2014
We needed crossbars to fit our 2014 Ford Flex. They worked great, and did a nice job holding up our luggage topper.
2014 Ford Flex Yakima Railgrab Roof Rack Crossbars System
5 stars - great!
Written by family traveler, on 4/12/2014
These just make our thule possible, our bike rack possible...
2011 Honda Pilot Yakima Railgrab Roof Rack Crossbars System